Dry shaver with electric driving motor built in the handle



Aug. 11, 1942.

V. KOBLER ET AL DRY SHAVER WITH, ELECTRIC DRIVING MOTOR BUILT-IN THE HANDLE Filed July 17, 1959 MWAW Patented Aug. 11, 1942 OFFICE DRY SHAVER WITH ELECTRIC DRIVING MOTOR BUILT IN THE HANDLE Victor Kobler and Werner Kobler, Zurich, Switzerland Application July 17, 1939, Serial No. 284,957 In Switzerland July 23, 1938 2 Claims.

Dry shavers with electric driving motors built in the handle are already known. But the flexible electric cord entering the handle hinders the packing of the apparatus with the cord, in as little space as possible. Contrivances are known whereby this disadvantage can be overcome, the electric cord being removed from the handle after use, by means of a plug. But in use such a stiff connection of the cord with the handle is also a drawback, as by the movements of the dry shaver the cord is continually being bent, which, after a short period of use, can lead to a defect in the same. Further the stiff connection prevents the free manipulation of the dry shaver in the hand.

These drawbacks are done away with by the present invention. It comprises a dry shaver with an electric driving motor built in the handle and is characterized by the fact that the electric cord is attached to the handle with a movable joint. This type of movable joint not only allows the packing .of the dry shaver in a small space but also the easy manipulation of the same, and prevents the cord from bending near the exit point at the handle.

The drawing shows a few embodiments of the invention.

Fig. 1 shows the dry shaver seen from above with a partial sectional View of the handle at the lower end.

Fig. 2 shows the same embodiment seen from the side.

Fig. 3 shows an individual part of another embodiment of the invention.

The two housings I and I" forming the handle are screwed together by the screws 2. An electric driving motor is fitted inside the handle, of which only the armature contacts I8 and I8, as well as I9 and I9 are visible on the draw- 1ng A fixed cutting-blade 3 is held in position by two plugs 3 at the top end of the handle. The plugs 3 are held in the slots 3" by two springslides 6. A movable cutting-blade 4 is provided between the fixed cutting-blade 3 and the handle, which movable blade is oscillated to-andfro by means of a lever 5, the latter forming part of the electric driving motor built in the handle. The cutting-blades can be taken out of the handle by pressing the two spring-slides 6 toward each other.

On either of the narrow sides of the handle a slot 1 is situated, the purpose of which is to manually actuating a ring I encircling the armature l.

Two supports or lugs Ill are provided at the bottom end of the handle between which the cord-head 9 of the cord 8 is movably secured on shaft II, the latter being made out of insulating material. The shaft II goes through the cordhead 9 and is fitted with metal sleeves I2 at each end which protrude into the interior of the cordhead 9, there making contact with the two connecting-wires in the cord.

The connecting terminals I3 take the current away from the two metal sleeves I2 fixed on to the rotating shaft I I and carry it over to the two studs I5 placed on each side of the slide I4. The ends of the slide I4 are accessible by means of a small hole placed each side of the handle, and according to the position of the slide I4, the current is carried over to the driving-motor connection terminals I8 and I8 or I9 and I9 by the studs I5.

This arrangement permits the building of a motor inside the handle, whose magnetic windings possess two or more different electrical resistances thus allowing the dry shaver to be connected to various voltage ranges. The voltage figures are visible through the slots suitably placed on both sides of the handle and are brought into position by moving the slide I4, so that it can be easily seen on which voltage range the motor is set. .j

The movable cord fitted between the supports I0 permits the shaver to be moved in any required direction so that the cutting-blade can I be drawn over the part of the face to be shaved,

the shaver turned to use one side or the other of the cutting blade, without the hand being in any way disturbed by the cord.

Fig. 2 shows, by means of the small dotted lines, how the cord can be folded when packing the dry shaver so that the whole can be fitted into the smallest possible space which is important when travelling, etc. Fig. 3 shows a conduit cord 8 with cord-head 9 whose execution only differs from the above-mentioned description in that the shaft I I consists of a Bakelite, fiber or similar material tube with an electroconductive metal core II, placed in the interior. One end of the latter is connected with a" contact spring I3 and the center to a third wire in the cord. The two metal studs I2 placed at either end of the shaft I I are, as described above, connected in the cord-head with the contactwires and carry the electric current over to the enable the user to set the motor in motion by two connecting terminals I3. The third conductor received by the core H can be used to connect a protector against wireless disturbances, or other contrivances, if required.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a dry shaver having an electric driving motor built in the handle and an electric cord for supplying current to said motor; non-detachable connecting means interposed between said cord and said handle and comprising a shaft extending transversely to a portion of ,said cord adjacent thereto, the cord having an enlarged end portion forming a head in which said shaft is rigidly fixed and from which said shaft protrudes in the form of two current carrying pivots, said shaft comprising a metallic core, an insulating sleeve on said core, two metal sleeves arranged on said insulating sleeve spaced apart from each other and connected to two conduit wires of the cord, and a third wire of the cord connected to said metallic core of the shaft and representing a third point of the conduit wire adapted to be connected to means for suppressing interference to radio reception or the like.

2. In a dry shaver, a casing serving as a handle and a motor casing and having a shaver at one end thereof, said casing having a pair of integral longitudinally-extending lugs at the opposite end of the casing and substantially forming a continuation of the side of the casing, an electric conducting cord having an enlarged insulated end, a shaft passing through said enlarged end and mounted at its ends in said lugs, pivotal electric connection means, including said shaft, intercalated between said lugs and cord and connected with said cord, said shaft being spaced some distance from the inner ends of said lugs, and the opposite side faces of the casing being bevelled and extending between the lugs and terminating at their inner ends below the enlarged insulated end of the core, whereby the shaft of the cord can be swung into position to allow the cord to lie in the bevelled face approximately parallel with the sides of the casing without sharply bending the same, and the cord can then be wound about the casing longitudinally for packing.

VICTOR KOBLER. WERNER KOBLER. 

